Power Maximizing Function Does Not Work - Komatsu PC210-8 Shop Manual

UEN00245-02
H-14 Power maximizing function does not work
Trouble

• Power maximizing function does not work.

Related
• Carry out all troubleshooting in power mode (P) of working mode.
information
Possible
Malfunction of 2-stage relief
causes and 1
solenoid valve
standard value
in normal state
Malfunction of main relief
2
valve
H-15 In compound operation of work equipment, speed of part loaded
more is low
Trouble
• In compound operation of work equipment, speed of part loaded more is low.
Related
information
Possible
causes and
Malfunction of control valve
standard value
1 (pressure compensation
in normal state
valve) on less load side
18
Cause Standard value in normal state/Remarks on troubleshooting
a
Main relief valve may have malfunction. Check it directly.
Cause Standard value in normal state/Remarks on troubleshooting
Pressure compensation valve of control valve on less load side
may have malfunction. Check it directly.
Compound operation
Prepare with engine stopped, then run engine at high idle and
carry out troubleshooting.
Swing lock switch
OFF
ON
Larger load side
Boom raise
+ Boom raise
Arm curl
Boom raise
+ Arm dump
Arm dump
Boom raise
+ Boom raise
Bucket curl
Arm dump
+ Arm dump
Bucket curl
Boom lower
+ Arm dump
Arm dump
40 Troubleshooting
2-stage relief solenoid valve
output pressure
0 MPa
2
{0 kg/cm }
2.9 MPa
2
{30 kg/cm }
Less load side
Arm curl
Boom raise
Bucket curl
Bucket curl
Boom lower
PC210, 230, 240-8
1
1